Let's put it this way:
You can purchase the software. You can agree to the license agreement. But note that SW does not say that they grant the license for any payment of money. And if they terminate the license the original seller will apparently have to return the software to SW. The bottom line is your chances of getting support, subscription services or relief from SW coming after you or the seller are pretty slim.
"1.A. Grant of License. SolidWorks grants to you a nonexclusive nontransferable license to use the Software and the printed and/or electronic user documentation (the "Documentation") accompanying the Software in accordance with this Agreement. If you have paid the license fee for a single user license, this Agreement permits you to use one copy of the Software on any single computer, provided that the Software is in use on only one computer at any time."
"3. Other Restrictions on Use. This Agreement is your proof of license to exercise the rights granted herein and must be retained by you. Other than as permitted under the license grant in Article 1.B., you may not use any portion of the Software separately from or independently of the Software and other than for your normal business purposes and you may not provide access to or use of the Software to any third party; consequently you may not sell, license, sublicense, transfer, assign, lease or rent (including via an application service provider (ASP) or timeshare arrangement) the Software or the license granted by this Agreement"
"5. Term. The license granted herein will continue until it is terminated in accordance with this Article 5. SolidWorks may terminate the license granted herein immediately upon written notice to you (i) for justified cause, including without limitation breach of any provision of Article 2 or 3 of this Agreement, or (ii) if you breach any provision of this Agreement and fail to cure such breach within fifteen (15) days of notice thereof. Upon the termination of the license, you will promptly return to SolidWorks or destroy all copies of the Software and Documentation covered by the license as instructed by SolidWorks. The provisions of Articles 2, 3, 5, 7 and 10 of this Agreement shall survive any termination of this Agreement."